I had done that, what about " connection refused" error. I belive becouse this error I anot able to receved email. All connections to the server are refused. I had tried sending email from different providers and no good

This is the output

mail:~ # postmap /etc/aliases
postmap: warning: /etc/aliases, line 17: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 20: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 23: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 24: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 25: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 26: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 27: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 28: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 29: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 30: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 31: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 32: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 33: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 34: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 35: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 36: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 37: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 38: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 39: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 41: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 44: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 45: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 46: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 47: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 48: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 49: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 50: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 51: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 52: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 53: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 54: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 56: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 57: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 58: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 59: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 60: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 61: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 62: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 63: record is in "key: value" format; is this an alias file?
postmap: warning: /etc/aliases, line 91: record is in "key: value" format; is this an alias file?
mail:~ #